Heat Pump Servicing: What You Need to Know

As more UK households make the switch to heat pumps, understanding how to maintain these systems is crucial for performance, longevity, and efficiency. Unlike gas boilers—which many homeowners neglect until something breaks—heat pumps benefit from regular servicing. Here's everything you need to know.

Why Do Heat Pumps Need Servicing?

Heat pumps are complex machines that require care, much like a car. When properly maintained, a heat pump can serve your home efficiently for 15 to 20 years or more. Regular servicing helps ensure:

• Continued high performance

• Early detection of faults

• Maximised energy efficiency

• Validity of warranty agreements

In fact, many manufacturer warranties require annual servicing. Previously, government schemes like the Domestic Renewable Heat Incentive also mandated yearly declarations confirming a system had been serviced.

How Often Should a Heat Pump Be Serviced?

An annual service is generally recommended. The ideal time for servicing is late summer or early autumn—just before the heating season begins. At this time, engineers are more available and less likely to be handling winter breakdowns.

What's Included in a Heat Pump Service?

A comprehensive annual service usually includes:

• System diagnostics: Reviewing controller data and error logs

• Mechanical checks: Inspecting fan bearings, compressors, and moving parts

• Airflow and heat exchanger inspection: Clearing debris and ensuring proper ventilation

• Pump settings and flow rates: Optimising system efficiency

• Radiator balance: Ensuring even heat distribution around the home

For ground source heat pumps, it’s especially important to test the thermal transfer fluid in the ground loops. This fluid is biodegradable and may break down over time, reducing efficiency.

Can I Service My Heat Pump Myself?

While full servicing should be done by a professional, homeowners can handle a few basic checks:

• Clear airflow paths: Remove leaves and debris from around outdoor units

• Inspect pipe insulation: Look for wear and tear or UV damage

• Monitor efficiency: Many systems display their Coefficient of Performance (COP) and seasonal averages

Ground source systems may require occasional checks on fluid levels, but routine tasks like bleeding radiators and checking for draughts remain homeowner-friendly.

How Much Does Heat Pump Servicing Cost?

Servicing costs are currently higher than for traditional gas boilers. This is largely due to the smaller pool of qualified engineers. In urban areas, you might have ten boiler technicians within reach, but only one or two heat pump specialists.

However, the landscape is changing. More companies now offer dedicated service and maintenance packages—some linked to warranties that can last up to seven years.

What About Smart Monitoring and Remote Access?

Many modern heat pumps are internet-enabled. With a service contract, engineers can remotely monitor your system for signs of inefficiency or failure. This reduces the need for emergency callouts and helps optimise system performance.

Are Heat Pump Controls Difficult to Use?

Some users find heat pump controllers complicated. It’s true that many models have multiple access levels—basic for homeowners and advanced for technicians. However, systems should be installed with minimal homeowner intervention in mind.

A good installer should:

• Provide a thorough handover

• Offer basic training

• Leave clear manuals and warranty documents

If the heat pump was inherited with the home, or if you didn't get a proper tutorial, it might be worth arranging a session with a professional to walk through the controls.

Tips for Easier Use:

• Look for models with intuitive interfaces

• Ask your installer to pre-set your heating preferences

• Use “boost” and “comfort” modes for guests or unusual usage

The Bottom Line: Treat It Like a Car

Think of a heat pump like a car: you don’t wait for the engine to break before checking the oil. The same goes for your home heating system. With an annual check-up and a few basic maintenance steps, your heat pump can serve you efficiently for years to come—keeping your home warm, your bills low, and your carbon footprint shrinking.

Heat Pump Servicing and Maintenance: UK Homeowner FAQs Answered

How often should I service my heat pump in the UK?

You should service your heat pump once a year. Annual maintenance helps maintain efficiency, extends the lifespan of your system, and ensures compliance with manufacturer warranties. It’s best to schedule servicing before the heating season, ideally in late summer or early autumn, when engineers are more readily available.

What is the cost of heat pump maintenance in the UK?

The average cost of servicing a heat pump in the UK ranges from £150 to £250. This can vary depending on your location, the type of heat pump (air source vs. ground source), and whether you have a service plan. While this is generally higher than boiler servicing costs, prices are expected to become more competitive as the installer network grows.

Can I service my air source heat pump myself?

You can perform basic maintenance tasks yourself, such as:

• Clearing leaves and debris from the outdoor unit

• Checking pipe insulation for wear or UV damage

• Monitoring the system’s efficiency via its controller

However, professional servicing is still essential once a year to inspect components, diagnose issues, and maintain your warranty.

What are the typical heat pump warranty requirements?

Most heat pump warranties in the UK require:

• Annual servicing by a qualified engineer

• Adherence to the manufacturer’s installation and maintenance guidelines

• Use of authorised parts and service providers

Warranties often range from 5 to 7 years, and skipping regular maintenance may void your coverage.

How do I troubleshoot low COP in my heat pump?

If your heat pump’s Coefficient of Performance (COP) is lower than expected, check the following:

• Blocked airflow: Clear any debris around the outdoor unit

• Incorrect settings: Review your heating curves and flow temperatures

• Degraded insulation: Check for worn or missing pipe insulation

• Poor flow rates: Ensure radiators are balanced and circulating properly

• System faults: Look for error codes or schedule a professional inspection

Monitoring your seasonal performance factor (SPF) over time can help you identify trends and maintain efficiency.